The Battle at Iron Hill was a fight between Arthur’s beastpeople and the an army of Draco-Humans who had come to take Arthur’s enchanted glasses.

During the battle, Arthur took a poisoned mint-jelly crossbow bolt in order to save Big Jeremy. As Big Jeremy held his dying king in his arms, Arthur gave him the glasses and said, “Jeremy, take my glasses, and all will be revealed.”

Big Jeremy took the glasses and, putting them on, became the rightful king. A shock wave was released and the head of Big Jeremy's light mace grew in size, glowing gold and yellow. At this stage, he could not control the glasses’s power. Spinning the mace around, he destroys the incoming armies and saved Iron Hill.